DIN Number or Director Identification Number is a unique identification 8 digit number that is required for any existing Director of a Company. Director Identification Number (DIN) is introduced in India under Companies Amendment Act, 2006. The Director Identification Number provides a unique identity to the director which helps in maintaining information and Record of all directors of a company in a database. According to Companies Amendment Act, 2006, Director Identification Number (DIN) is essential for all existing and new directors or proposed directors of a private limited company registration and DIN has lifetime validity.